<template>
    <div>
       <!--面包屑导航-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
        <el-alert title="添加商品的信息" type="info" :closable="false"></el-alert>
        <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
            
          </el-steps>

          <!--tab-->
          <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-position="top" label-width="100px">
          <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
            <el-tab-pane label="基本信息" name="0">
                <el-form-item label="商品名称" prop="goods_name">
                    <el-input v-model="addForm.goods_name"></el-input>
                </el-form-item>
                <el-form-item label="商品价格" prop="goods_price">
                    <el-input v-model="addForm.goods_price"></el-input>
                </el-form-item>
                <el-form-item label="商品重量" prop="goods_weight">
                    <el-input v-model="addForm.goods_weight"></el-input>
                </el-form-item>
                <el-form-item label="商品数量" prop="goods_number">
                    <el-input v-model="addForm.goods_number"></el-input>
                </el-form-item>
                <!-- <el-form-item label="商品分类" prop="goods_name">
                    <el-input v-model="addForm.goods_names"></el-input>
                </el-form-item> -->

                <el-form-item label="商品分类" prop="goods_cat">
                    <el-cascader
                    v-model="addForm.goods_cat"
                    :options="catelist"
                    :props="cateProps"
                    @change="handleChange">
                    </el-cascader>
                </el-form-item>
            </el-tab-pane>

            <el-tab-pane label="商品参数" name="1">
                <!--渲染圣品参数-->
                <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                    <!--复选框组-->
                    <el-checkbox-group v-model="item.attr_vals" >
                        <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>
                      </el-checkbox-group>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
                <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                    <el-input v-model="item.attr_vals"></el-input>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
                <!--action 表示图片要上传到的后台API地址-->
                <el-upload
                    :action="uploadUrl"
                    :on-preview="handlePreview"
                    :on-remove="handleRemove"
                    list-type="picture" :headers="headerObj" :on-success="handleSuccess">
                    <el-button size="small" type="primary">点击上传</el-button>
                    <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
                <!--富文本编辑器-->
                <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
        </el-form>
    </el-card>

    <!--图片预览-->
    <el-dialog
    title="图片预览"
    :visible.sync="preViewVisible"
    width="50%">
    <img :src="previewPath" class="prewImag">
    </el-dialog>
    </div>
</template>

<script>
    import _ from 'lodash'
    export default{
        data(){
            return {
                activeIndex:'0',
                //添加商品的表单数据对象
                addForm:{
                    goods_name:'',
                    goods_price:0,
                    goods_weight:0,
                    goods_number:0,
                    //商品所属的分类数组
                    goods_cat:[],
                    pics:[],
                    goods_introduce:'',
                    attrs:[]
                },
                addFormRules:{
                    goods_name:[
                        {required:true,message:'请输入商品名称',trigger:'blur'}
                    ],
                    goods_price:[
                        {required:true,message:'请输入商品价格',trigger:'blur'}
                    ],
                    goods_weight:[
                    {required:true,message:'请输入商品的重量',trigger:'blur'}
                    ],
                    goods_number:[
                        {required:true,message:'请输入商品的数量',trigger:'blur'}
                    ],
                    goods_cat:[
                        {required:true,message:'请输入商品的分类',trigger:'blur'}
                    ]
                },
                catelist:[],
                cateProps:{
                    label:'cat_name',
                    value:'cat_id',
                    children:'children'
                },
                manyTableData:[],
                onlyTableData:[],
                uploadUrl:'http://127.0.0.1:8888/api/private/v1/upload',
                //图片上传组件的headers请求头对象
                headerObj:{
                    Authorization:window.sessionStorage.getItem('token')
                },
                previewPath:'',
                preViewVisible:false
            }
        },
        created(){
            this.getCateList()
        },
        methods:{
            async getCateList(){
                const {data:res} = await this.$http.get(`categories`)
                if(res.meta.status !== 200){
                    this.$messaeg.error('获取分类失败')
                }
                
                this.catelist = res.data
                console.log(this.catelist)
                

            },
            handleChange(){
                if(this.addForm.goods_cat.length !== 3){
                    this.addForm.goods_cat = []
                }
                
            },
            //切换标签页进行触发  active:即将进入标签的名字  old即将离开的标签名字
            beforeTabLeave(activeName,oldActiveName){
                if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3){
                    this.$message.error('请先选择商品分类!')
                    return false
                }
            },
            async tabClicked(){
                //访问动态参数面板
                if(this.activeIndex === '1'){
                    const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
                        params:{sel:'many'}
                    })

                    if(res.meta.status !== 200){
                        this.$message.error('获取参数列表失败')
                    }

                    res.data.forEach(item => {
                        item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
                    })
                    this.manyTableData = res.data
                } else if(this.activeIndex === '2'){
                    const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
                        params:{sel:'only'}
                    })
                    if(res.meta.status !== 200){
                        this.$message.error('获取静态属性失败')
                    }
                    this.onlyTableData = res.data
                    console.log(this.onlyTableData)

                }
            },
            handlePreview(file){
                this.previewPath = file.response.data.url
                this.preViewVisible = true
            },
            //移除图片的操作
            handleRemove(file){
                const filePath = file.response.data.tmp_path
                const i = this.addForm.pics.findIndex(x => 
                    x.pic === filePath
                )
                this.addForm.pics.splice(i,1)
            },
            //监听图片上传成功的事件
            handleSuccess(response){
                //拼接
                console.log(response)
                const picinfo = {pic:response.data.tmp_path}
                //2.push到pics
                this.addForm.pics.push(picinfo)
                console.log(this.addForm)

            },
            add(){
                this.$refs.addFormRef.validate(async valid => {
                    if(!valid){
                        return this.$message.error('请填写必要的表单项!')
                    }
                    //执行业务逻辑
                    const form = _.cloneDeep(this.addForm)
                    form.goods_cat = form.goods_cat.join(',')
                    //处理动态参数和静态属性
                    this.manyTableData.forEach(item => {
                        const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')}
                        this.addForm.attrs.push(newInfo)
                        
                    })

                    this.onlyTableData.forEach(item =>{
                        const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals}
                        this.addForm.attrs.push(newInfo)

                    })
                    form.attrs = this.addForm.attrs

                    //发起请求添加商品
                    //商品的名称必须是唯一的
                    const {data:res} = await this.$http.post(`goods`,form)

                    if(res.meta.status !== 201){
                        this.$message.error('添加商品失败')
                    }

                    this.$message.success('添加商品成功')
                    this.$router.push('/goods')
                    
                })
            }
        },
        computed:{
            cateId(){
                if(this.addForm.goods_cat.length === 3){
                    return this.addForm.goods_cat[2]
                }
                return null
            }
        }
    }
</script>

<style lang="less" scoped>
    .el-checkbox{
        margin:0 10px 0 0 !important ;
    }
    .prewImag{
        width: 100%;
    }
    .btnAdd{
        margin-top: 15px;
    }
</style>